AJ McCarron signed as a free agent with the Buffalo Bills in March with the hope of becoming a starting quarterback in the NFL. Instead, McCarron will begin the 2018 season as Derek Carr's backup with the Oakland Raiders.

The Buffalo Bills came out of Sunday's third preseason game no nearer to naming a starting quarterback for their regular-season opener on Sept. 8 than they were when training camp started. At least, publicly.

During the Buffalo Bills' preseason game on Friday night, reports surfaced that starting quarterback AJ McCarron had suffered a hairline fracture of his collarbone in the contest. But on Monday evening, ESPN and NFL Network reported McCarron had not sustained such an injury.

The Buffalo Bills opened their preseason schedule on Thursday night with Nathan Peterman at quarterback, switched to AJ McCarron in the second quarter under center and let rookie Josh Allen finish the game in the second half.